My son suffers from acid reflux, severe constipation,colic and bad gas, do you think nutrimegen will help him?

My son is 7 weeks old. Since he was born he has had terrible problems with his belly :(. At birth he was very constipated and i had to help him go to the bathroom everyday with a thermometer. We tried prune juice, karo syrup, pear juice ,suppositories and 4 different types of formula! Finally the doctor said that he was having trouble breaking down the protein in the milk which was making him constipated so he switched him to gerber good start which is partially broken down and it helped a little bit. However he still grunts and moans and groans all day and struggles to go. He goes about once every 2 or 3 days. He also has silent reflux which he is taking pepcid for. He is always gassy and in pain and never sleeps. He is just not a happy baby. I havent slept in weeks and neither has he. I heard that the formula called nutrimagen works wonders for babies like mine. Has anyone else had a good expierence with this milk? Will it work for me? i will try anything to make him better. thanks alot